World Geography
Which among the following statements is/are correct about the stratosphere?The Stratosphere is the layer of the Earth’s atmosphere which lies beyond the mesosphere.It extends up to an altitude of 50 kilometres from the earth’s surface.This layer is ideal for flying aeroplaneSelect the correct code from the options given below:

Only 2 & 3
Only 1 & 2
1, 2 & 3
Only 1

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World Geography
Which among the following statements is not correct about Plunge pool?

They occur at the mature stage of the river development
They are often very deep, generally related to the height of fall and the volume of water,
It is created by the erosional forces of cascading water
It is a deep depression in a stream bed at the base of a waterfall

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